Which organization is primarily focused on providing support to military families?

The Navy-Marine Corps Relief Society is specifically designed to support military families, primarily those associated with the Navy and Marine Corps. It provides financial assistance, educational scholarships, and various resources tailored to the unique challenges faced by service members and their families. This organization is integral in addressing the welfare of military families through programs that cater to their distinct needs, such as emergency financial help, budgeting counseling, and transitioning assistance.

In contrast, the other organizations listed have missions that do not focus on military families. The World Wildlife Fund is dedicated to conservation efforts and environmental protection. The United Nations works on a broader spectrum of global issues, including peacekeeping and humanitarian efforts, but does not specifically target military family support. Amnesty International focuses on human rights advocacy and activism worldwide, which again does not align with the specific needs of military families. Thus, the Navy-Marine Corps Relief Society stands out as the primary organization focused on this important demographic.